Leo: I don't know what's wrong with me: I can't eat, can't sleep; I think I'm coming down with something.
Masky: [chuckles] I know what you've got: the "L" word.
Toby: Yeah, leprosy!
Masky: No, kid, no. It's four letters, starts with "L", ends with "E".
Toby: Ah, lice!
Masky: No. Leo, our friend, is in love.
Toby: Oh, yeah! Love!
Leo: You mean with Natalie - that "princess" looking girl? No.
Toby: Oh, Natalie's gotten under your skin! Come on, admit it!
Masky: A twisted guy like you...
Toby: A twisted girl like her. [laughs]
Leo: No, no, no. You guys are dead wrong!
[Masky and Toby stare at each other, then burst out laughing]
Masky: Denial is the clincher! You're in love, Sparky!
Both, singing: Leo and Nat, sitting in a tree, K-I-S-S-I-N-G!
Leo: Real mature, guys. Real mature...